Results 101 to 110 of about 184,560 (234)

Impacts of Bar-driven Shear and Shocks on Star Formation

The Astrophysical Journal
Bars drive gas inflow. As the gas flows inward, shocks and shear occur along the bar dust lanes. Such shocks and shear can affect the star formation (SF) and change the gas properties.
Taehyun Kim, Dimitri A. Gadotti, Miguel Querejeta, Isabel Pérez, Almudena Zurita, Justus Neumann, Glenn van de Ven, Jairo Méndez-Abreu, Adriana de Lorenzo-Cáceres, Patricia Sánchez-Blázquez, Francesca Fragkoudi, Lucimara P. Martins, Luiz A. Silva-Lima, Woong-Tae Kim, Myeong-Gu Park   +14 more
doaj   +1 more source

The Physical Drivers and Observational Tracers of CO-to-H2 Conversion Factor Variations in Nearby Barred Galaxy Centers

The Astrophysical Journal, 2023
The CO-to-H _2 conversion factor ( α _CO ) is central to measuring the amount and properties of molecular gas. It is known to vary with environmental conditions, and previous studies have revealed lower α _CO in the centers of some barred galaxies on ...
Yu-Hsuan Teng, Karin M. Sandstrom, Jiayi Sun, Munan Gong, Alberto D. Bolatto, I-Da Chiang, Adam K. Leroy, Antonio Usero, Simon C. O. Glover, Ralf S. Klessen, Daizhong Liu, Miguel Querejeta, Eva Schinnerer, Frank Bigiel, Yixian Cao, Mélanie Chevance, Cosima Eibensteiner, Kathryn Grasha, Frank P. Israel, Eric J. Murphy, Lukas Neumann, Hsi-An Pan, Francesca Pinna, Mattia C. Sormani, J. D. Smith, Fabian Walter, Thomas G. Williams   +26 more
doaj   +1 more source

Star Formation Properties in Barred Galaxies(SFB). III. Statistical Study of Bar-driven Secular Evolution using a sample of nearby barred spirals [PDF]

, 2014
Stellar bars are important internal drivers of secular evolution in disk galaxies. Using a sample of nearby spiral galaxies with weak and strong bars, we explore the relationships between the star formation feature and stellar bars in galaxies. We find that galaxies with weak bars tend to be coincide with low concentrical star formation activity, while
arxiv   +1 more source

Bar Diagnostics in Edge-On Spiral Galaxies. I. The Periodic Orbits Approach

, 1999
We develop diagnostics to detect the presence and orientation of a bar in an edge-on disk, using its kinematical signature in the position-velocity diagram (PVD) of a spiral galaxy observed edge-on.
Athanassoula E., Athanassoula E., Athanassoula E., Athanassoula E., Binney J., Bureau M., Combes F., Combes F., Contopoulos G., Contopoulos G., Contopoulos G., de Carvalho R. R., E. Athanassoula, Ferrers N. M., Fux R., Kalnajs A. J., Kuzmin G., M. Bureau, Mulder W. A., Papayannopoulos T., Pfenniger D., Schwarz M. P., Sparke L. S., Teuben P., van Albada T. S., Weiner B. J., Wozniak H.   +26 more
core   +1 more source

The stellar kinematics of co-rotating spiral arms in Gaia mock observations [PDF]

, 2015
We have observed an N-body/Smoothed Particle Hydrodynamics simulation of a Milky Way like barred spiral galaxy. We present a simple method that samples N-body model particles into mock Gaia stellar observations and takes into account stellar populations,
Cropper, Mark, Grand, Robert J. J., Hunt, Jason A. S., Kawata, Daisuke, Minchev, Ivan, Pasetto, Stefano   +5 more
core   +2 more sources

PHANGS–JWST First Results: Rapid Evolution of Star Formation in the Central Molecular Gas Ring of NGC 1365

The Astrophysical Journal Letters, 2023
Large-scale bars can fuel galaxy centers with molecular gas, often leading to the development of dense ringlike structures where intense star formation occurs, forming a very different environment compared to galactic disks.
Eva Schinnerer, Eric Emsellem, Jonathan D. Henshaw, Daizhong Liu, Sharon E. Meidt, Miguel Querejeta, Florent Renaud, Mattia C. Sormani, Jiayi Sun, Oleg V. Egorov, Kirsten L. Larson, Adam K. Leroy, Erik Rosolowsky, Karin M. Sandstrom, T. G. Williams, Ashley. T. Barnes, F. Bigiel, Mélanie Chevance, Yixian Cao, Rupali Chandar, Daniel A. Dale, Cosima Eibensteiner, Simon C. O. Glover, Kathryn Grasha, Stephen Hannon, Hamid Hassani, Jaeyeon Kim, Ralf S. Klessen, J. M. Diederik Kruijssen, Eric J. Murphy, Justus Neumann, Hsi-An Pan, Jérôme Pety, Toshiki Saito, Sophia K. Stuber, Robin G. Treß, Antonio Usero, Elizabeth J. Watkins, Bradley C. Whitmore, PHANGS   +39 more
doaj   +1 more source

Bar Fraction in Early- and Late-type Spirals [PDF]

, 2019
Bar fractions depend on the properties of the host galaxies, which are closely related to the formation and evolution of bars. However, observational studies do not provide consistent results. We investigate the bar fraction and its dependence on the properties of the host galaxies by using three bar classification methods: visual inspection, ellipse ...
arxiv   +1 more source

Bar rejuvenation in S0 galaxies? [PDF]

, 2020
Based on the colour measurements from a multi-band, multi-component 2D decomposition's of S0 and spiral galaxies using SDSS images, we found that bars are bluer in S0 galaxies compared to the spiral galaxies. Most of the S0s in our sample have stellar masses $\sim L_{*}$ galaxies.
arxiv   +1 more source

Hydrodynamical Simulations of the Barred Spiral Galaxy NGC 6782 [PDF]

, 2006
NGC 6782 is an early-type barred spiral galaxy exhibiting a rich and complex morphology with multiple ring patterns. To provide a physical understanding of its structure and kinematical properties, two-dimensional hydrodynamical simulations have been ...
Lien-Hsuan Lin, C. Yuan, R. Buta
semanticscholar   +1 more source

Rings and spirals in barred galaxies – II. Ring and spiral morphology [PDF]

Monthly Notices of the Royal Astronomical Society, 2009
15 pages, 11 figures, accepted for publication in ...
E. Athanassoula, A. Bosma, Manuel Romero-Gómez, Manuel Romero-Gómez, Josep J. Masdemont   +4 more
openaire   +3 more sources